Make-and-break device.



PATENTED AUG. 18, 1908.

D. SANDRETTO. MAKE AND BREAK DEVICE.

APPLICATION FILED JUNE 22, 1908.

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DUMINIG SANDRETTO, OI" LADD, ILLINOIS.-

MAKE-AND BREAK DEVICE.

Specification of Letters Patent.

Patented Aug. is, 1908.

Application filed June 22, 1908. Serial No. 439,856.

To all whom it mag concern:

Be it known that I, DOMINIC SANDRETro, a citizen of the United States, and a resident of Ladd, county of Bureau, and State of Illinois,-have invented certain new and useful Improvements in Make-and-Break Devices, of which the following is a specification.

My invention .relates to a make-and-break device for o erating light machinery, such as clocks, by e ectricity and particularly to improvements in' the device shown and described in Patent No. 886,157 granted to me.

The ob'ect of my invention is to provide a make an break device for the purpose above stated, which shall be of such improved construction as to obviate the necessity of using expensive materials, and in which the contacts will be automatically kept clean and in perfect working order-indefinitely.

' Otherobjects will appear hereinafter.

My invention will be more readily understood by reference to the accompanying drawing forminga part of this specification and in which v Figure 1. is an-elevation of a device embodying my invention in its referred form, Fig. 2. 1s a similar view with t e parts shown in a different position, Fig. 3-. is-a plan view detail.

In the drawings I-have illustrated the device as operably connected to a clock mechanism, it beingunderstood that the device is.

not limited to such use.

Referring to the drawings 1 indicates a plate forming the frame of the device and bywhich it is secured in place adjacent to the device to be y the screws 2. p ate 1 are a pair of electro-magnets 3 beneath the poles 4 of which are pivotally somewhat lon er than the bar 5, and to its outer end is pivotally connected a vertically disposed rod 7 having a suitable device at its upper end for engaging the mechanism to be 0 erated such for instance, the wheels of a c ock. This com rises a 100 8, formed of wire and pivotal connecte end of .the rod 7 and held in engagement with a a wheel of the clock by a spring 9.

10 indicates the frame of a clock or other mechanism and 10 the wheel. In order to properly adjust the loop 8 to the wheel 10 after the device is secured in position, the rod 7 is made adjustable in length as fully dedescribed in the aforementioned patent.

1. and 1 are binding posts by which the Secured to the 6. The bar 6 1s to the. upper device is connected to a battery (not shown). For, convenience the battery may. be arranged within the clock case, two small dry cells being sufficient. The post 1 is connect ed by a Wire 1 to the magnet and by the other post the o posite pole of the battery is connected to tiie frame 1 on the device. When the magnet is deener ized the bars. 5 and 6 drop by gravity. T e'bar 5 drops quickly and its movement is limited by a pin or stopj. The bar 6 drops slowly and as it drops, it turns the wheel, 10 causing the clock to run. It is obvious that the downward movement of the bar 6, to o crate the clock must be limited, hence, i provide means for quickly raising it as soon as it reaches a certain predetermined its downward travel. To this en means for energizing the magnet, '3, at the proper time to raise the bars, 5 and 6, the energlzing and deenergizing of the magnet being overned by the movements of the bar, 6. hen said bar reaches its lower limit of movement, it causes the circuit to the magnet to be closed. It is then immediately drawn up and as it movement it causes the circuit to be broken. The bar 5 merely assists in raising the bar, 6 the latter. being of greater weight and passing further from the poles of the magnet, is not so readily raised as the lighter one. When the magnet quickly raised and in rising, it engages a pin or arm, '14 on the bar, 6 thus assisting in raisin the bar, 6, and bringing it further movement of the bar 6 does of the field of the magomitted if t e not carry it too far out net.

The means for making and breaking the circuit through the magnet will now be demounted on a stud 15 extending from the frame 1, is a bell crank lever comprising the horizontal arm 16 and the vertical or depending arm 17. This is electrically connected with the frame, not being insulated therefrom. Fixed to the bell-crank lever and movable therewith is a segment 18 formed of insulating material and scribed. Pivotally segments or strips of German silver 19 and 20, separated by a small ap 21. The strips 19 and 20 are in ci'rcunerential alinement with each other and the stripl is insulated from the post 15 whereas the strip 20 is electrically connected therewith by a conductor osition in I provide reaches its upper limit of into t e ma netic field. The bar 5 may be fixed to the periphery thereof are a pair of 22. 23 indicates a binding post insulatedfrom the frame 1 and upon WlJlCl'l is mounted a brush 24 having the contact oint 25 of German silver which en ages t e contact plates 19 and 20. When t e bell-crank lever is in one position the contact 25 engages the plate 19 and the circuit through the magnet 1s broken and when in another position it engages theplate 2O establishing the circuit and energizing the magnet. The contact 25 is connected to the magnet by the wire 26 extending from .the magnet to the post 23.'

Pivotally mounted as at 27 uppn the plate 1 and beneath the plane of the ar 6 is a lever 28 which is normally held in raised position by a s ring 29, its upward movementxbeing limite b a stop 30. 1

Exten inglaterally from the lever 28 isa pin 31 whichextends beyond the lower end '17 of the. arm 17 and into thepath of the I bar 6. When the leverx28 is 'in raised posi-v tion, as shown-in Fig. 1, the end of the arm 17 rests against the pin 31 which holdsrthecontact 25 inengagementwith the segmental late or strip 19. As the bar 6 reaches its lower limit of movement it engages the pin 31, de lr'essing the lever 28 against the tension oft e spring 29-. This moves thepin 31 beyond the ower end of the arm 17, permitting the lever and the segment 1'8' to swing" upon its pivot 15, a spring 32 serv ng to. throw the lever as shown in Fig. 2 bringingthe plate 20 into engagement with the con tact 25. This closes the circuit and -energizes the magnet 3. As soon as the magnet ,is energized the barb is quickly raised until it'enga'ges the arm 14 at which time it is. further into the magneticfield than the bar 6' and assists in raising1 the latter into the 'field. As the barb and r0 7 rise and approach the upward limit of their movement a shoiilder '33.formed in the rod 7 engages the armf16 and restores the bell-crank ever and the seg-' ment18 to normal position breaking the cir-;

cuit and'dener "zing the magnet. As soon as the belloran lever is thrownback, the lever 23 risesand locks it in normal position until the bar G-again descends.

34 indicates a stop for limiting the movement of the segment when released and 5a stop for-limiting the'dropof the bar 5.

. scribed.

'Having described my invention what I said bar and adapted when energized to raise the same, a segment pivotally mounted adjacent to said bar and adapted to be operated by the same when it reaches its limit of downward movement to close the circuit to said magnet and to be operated by the upward movement of said bar to break the 01rcuit to the magnet, substantially as de- 2'. In a device of a class described, the mechanism to be driven in combination with a bar pivotally mounted adjacent thereto and adapted to operate'said mechanism by gravity an electro-ma net arrangedabove said bar and adapted w en-energized to raise the same, a bell-crank lever pivoted adjacent to said barand having a segment. of insula ing material rigidly fixed thereto, a pair'of contacts upon the periphery of said segment one of which-is arranged in the circuit of the magnet and the other insulated therefrom, 2148,). contact arranged adjacent to said segment and normally engaging the insulated contactthereon, I a second lever pivotally mounted to engage onearm of said be l.-crank lever to hold the segment in normal position, said pin extending. into the path 'of said bar and beneath said'bar and havin a, pin adapted adapted to be disengaged from the bell-crank lever by the'downward movement of'said bar, a s' ring for throwingbell-crank lever when re eased to close the circuit -to said magnet and means for returning 'saidlever an segment to normal position by the up ward movement of said bar, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribin witnesses.

, i OMINIO SANDRETTO. Witnesses: 1 r

DAMENICO GALL'O, PETER GRIVETTO. 

